Spain
overprinted (in blue) CORREO AEREO 1'50 PTS with 2 blue aircraft silhouettes
| Country: | Spain |
| Type: | Postage stamps |
| Series: | Monastry Montserrat |
| Nominal: | 1.50 Pta |
| Year: | 1938 |
| Perforation: | line 14 |
